diff --git a/VERSION b/VERSION
index 46d0bdd026..dbf1ae9ca4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.11.0-rc0
+1.12.0-alpha0
diff --git a/src/agent/Cargo.toml b/src/agent/Cargo.toml
index 3c6922a847..1fdfb60bbf 100644
--- a/src/agent/Cargo.toml
+++ b/src/agent/Cargo.toml
@@ -13,7 +13,7 @@ netlink = { path = "netlink" }
 lazy_static = "1.3.0"
 error-chain = "0.12.1"
 grpcio = { git="https://github.com/alipay/grpc-rs", branch="rust_agent" }
-protobuf = "2.6.1"
+protobuf = "=2.6.1"
 futures = "0.1.27"
 libc = "0.2.58"
 nix = "0.17.0"
diff --git a/src/agent/netlink/Cargo.toml b/src/agent/netlink/Cargo.toml
index 53d50cad48..c3cfe6d327 100644
--- a/src/agent/netlink/Cargo.toml
+++ b/src/agent/netlink/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 [dependencies]
 libc = "0.2.58"
 nix = "0.17.0"
-protobuf = "2.6.1"
+protobuf = "=2.6.1"
 rustjail = { path = "../rustjail" }
 protocols = { path = "../protocols" }
 slog = { version = "2.5.2", features = ["dynamic-keys", "max_level_trace", "release_max_level_info"] }
diff --git a/src/agent/protocols/Cargo.toml b/src/agent/protocols/Cargo.toml
index fc68c94769..4a576abf14 100644
--- a/src/agent/protocols/Cargo.toml
+++ b/src/agent/protocols/Cargo.toml
@@ -6,5 +6,5 @@ edition = "2018"
 
 [dependencies]
 grpcio = { git="https://github.com/alipay/grpc-rs", branch="rust_agent" }
-protobuf = "2.6.1"
+protobuf = "=2.6.1"
 futures = "0.1.27"
diff --git a/src/agent/rustjail/Cargo.toml b/src/agent/rustjail/Cargo.toml
index 030ee85c3c..bf5daf95ee 100644
--- a/src/agent/rustjail/Cargo.toml
+++ b/src/agent/rustjail/Cargo.toml
@@ -17,7 +17,7 @@ scopeguard = "1.0.0"
 prctl = "1.0.0"
 lazy_static = "1.3.0"
 libc = "0.2.58"
-protobuf = "2.6.1"
+protobuf = "=2.6.1"
 slog = "2.5.2"
 slog-scope = "4.1.2"
 scan_fmt = "0.2"